158890889 has 2 divisors, whose sum is σ = 158890890. Its totient is φ = 158890888.

The previous prime is 158890871. The next prime is 158890931. The reversal of 158890889 is 988098851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151708489 + 7182400 = 12317^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 158890889 - 2¹⁶ = 158825353 is a prime.

It is not a weakly prime, because it can be changed into another prime (158890859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79445444 + 79445445.

It is an arithmetic number, because the mean of its divisors is an integer number (79445445).

Almost surely, 2^158890889 is an apocalyptic number.

It is an amenable number.

158890889 is a deficient number, since it is larger than the sum of its proper divisors (1).

158890889 is an equidigital number, since it uses as much as digits as its factorization.

158890889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 56.

The square root of 158890889 is about 12605.1929378332. The cubic root of 158890889 is about 541.6262009166.

The spelling of 158890889 in words is "one hundred fifty-eight million, eight hundred ninety thousand, eight hundred eighty-nine".